Dual bios should only matter if for some reason you need to default to the factory bios. Which usually means you're being unsafe with your OC'ing practices. Just increase by +25 increments until you have artifacting, then back the OC off by 25 to get rid of the artifacting. Poof, you're safe unless you're messing with the voltage limitations, which is the only time I can see dual bios being useful. Not to talk you out of a FTW purchase. For all I know you're gonna be overvolting past the bios limitations.